4811661 has 6 divisors (see below), whose sum is σ = 6950190. Its totient is φ = 3207768.

The previous prime is 4811659. The next prime is 4811687. The reversal of 4811661 is 1661184.

It can be written as a sum of positive squares in only one way, i.e., 3261636 + 1550025 = 1806^2 + 1245^2 .

It is not a de Polignac number, because 4811661 - 2¹ = 4811659 is a prime.

It is a Curzon number.

4811661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4811461) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 267306 + ... + 267323.

It is an arithmetic number, because the mean of its divisors is an integer number (1158365).

Almost surely, 2^4811661 is an apocalyptic number.

It is an amenable number.

4811661 is a deficient number, since it is larger than the sum of its proper divisors (2138529).

4811661 is a wasteful number, since it uses less digits than its factorization.

4811661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534635 (or 534632 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 4811661 is about 2193.5498626655. The cubic root of 4811661 is about 168.8230235398.

The spelling of 4811661 in words is "four million, eight hundred eleven thousand, six hundred sixty-one".